Nano-organosiliconorganosilicon and polyurethane composite waterproof emulsion
A technology of nano-organic silicon and composite polyurethane, which is applied in the direction of liquid-repellent fibers, fiber types, textiles and papermaking, and can solve problems such as water resistance and insufficient mechanical properties
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[0031] The preparation method of double-terminal alkenyl organosilicon monomer:
[0032] In a dry four-necked flask equipped with a thermometer and a stirrer, add a certain amount of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane and octamethylcyclotetrasiloxane , heated up to the reaction temperature while stirring, and added a certain amount of trifluoromethanesulfonic acid, and kept the temperature for a certain period of time. After the reaction, add anhydrous Na 2 CO 3 Stir and neutralize to pH 6-7, filter and distill the product under reduced pressure (90°C, vacuum degree below -0.1Mpa) to remove unreacted monomers to obtain a colorless and transparent liquid product. The reaction process involved is shown in (1).
[0033]
[0034] Monovinyl silicone monomer is prepared by reacting 2-(trimethylsiloxy)ethanolamine with allyl chloride. The preparation method is:
[0035] In a 250 mL three-necked flask, 1 mol of 2-(trimethylsiloxy)ethanolamine, 1.5 mol of triethylamine an...
Embodiment 1
[0042] A nano-organosilicon composite polyurethane waterproof emulsion, which is composed of nano-organosilicon emulsion and water-based polyurethane emulsion. In terms of mass percentage, the nano-organosilicon emulsion is 34% and the water-based polyurethane emulsion is 66%;
[0043] Described nano silicone emulsion is made of vinyl nano SiO 2 Sol, double-terminated alkenyl silicone monomer (as shown in formula 1), monovinyl silicone monomer (as shown in formula 2), emulsifier, water, and initiator are prepared by emulsion polymerization;
[0044]
[0045] (H 3 c) 3 Si—O—CH 2 CH 2 NH-CH 2 CH=CH 2 Formula 2
[0046] Described aqueous polyurethane emulsion is made of polyether glycol, diisocyanate, dimethylol propionic acid, dihydroxysilane monomer (as shown in formula 3), triethylamine, ethylenediamine, catalyst, organic solvent, water reaction made;
[0047]
[0048] The vinyl nano-SiO 2 Sol, made of vinyl silane coupling agent, catalyst, water, emulsifier, the...
Embodiment 2
[0061] A nano-organosilicon composite polyurethane waterproof emulsion, which is composed of nano-organosilicon emulsion and water-based polyurethane emulsion. In terms of mass percentage, the nano-organosilicon emulsion is 41% and the water-based polyurethane emulsion is 59%;
[0062] Described nano silicone emulsion is made of vinyl nano SiO 2 Sol, double-terminated alkenyl silicone monomer (as shown in formula 1), monovinyl silicone monomer (as shown in formula 2), emulsifier, water, and initiator are prepared by emulsion polymerization;
[0063]
[0064] (H 3 c) 3 Si-O-CH 2 CH 2 NH-CH 2 CH=CH 2 Formula 2
[0065] Described aqueous polyurethane emulsion is made of polyether glycol, diisocyanate, dimethylol propionic acid, dihydroxysilane monomer (as shown in formula 3), triethylamine, ethylenediamine, catalyst, organic solvent, water reaction made;
[0066]
[0067] The vinyl nano-SiO 2 Sol, made of vinyl silane coupling agent, catalyst, water, emulsifier, t...
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